{"product_id":"stellar-automotive-group-th440-t4-4t60e-1-2-amp-3-4-accum-piston-fits-gm-83-up","title":"Stellar Automotive Group TH440-T4\/4T60E 1-2 \u0026amp; 3-4 Accum Piston fits GM 83-Up","description":"\u003cp dir=\"auto\"\u003e\u003cstrong\u003eStellar Automotive Group TH440-T4\/4T60E 1-2 \u0026amp; 3-4 Accumulator Bonded Piston (1 Spring Type) – Compatible for GM 1983-Up\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eEliminate harsh 1-2 and 2-3\/3-4 shifts, flare, and premature clutch wear with this upgraded bonded accumulator piston from Stellar Automotive Group.\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eThis direct-replacement piston (1 spring type) is the critical component in the 1-2 and 3-4 accumulator assemblies for all TH440-T4 and 4T60E transmissions. The factory piston commonly cracks or loses its bond under heat and mileage, causing inconsistent cushioning — leading to banging shifts, clutch slip, and rapid friction failure. This molded piston with permanently bonded rubber seal restores proper accumulator function, delivers smooth and firm shifts, and protects your 1-2 and 3-4 clutch packs for reliable performance in daily drivers or performance builds.\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003ePerfect fit for popular models including:\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul dir=\"auto\"\u003e\n \t\u003cli\u003eChevrolet Camaro, Corvette, Impala\u003c\/li\u003e\n \t\u003cli\u003eBuick Regal, LeSabre, Electra\u003c\/li\u003e\n \t\u003cli\u003eOldsmobile Cutlass, Delta 88\u003c\/li\u003e\n \t\u003cli\u003ePontiac Bonneville, Grand Prix\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eSymptoms of failing 1-2 or 3-4 accumulator pistons:\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul dir=\"auto\"\u003e\n \t\u003cli\u003eHarsh bang or flare on 1-2 or 2-3\/3-4 upshifts\u003c\/li\u003e\n \t\u003cli\u003eDelayed then hard gear engagement\u003c\/li\u003e\n \t\u003cli\u003eBurnt 1-2 or 3-4 frictions on teardown\u003c\/li\u003e\n \t\u003cli\u003eLow accumulator pressure during testing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp dir=\"auto\"\u003eDon’t let cracked pistons cost you clutch packs — install the Stellar Automotive Group bonded 1-2\/3-4 accumulator piston and shift smooth again.\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e All parts are distributed, not designed or manufactured, by Stellar Automotive Group.\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eAdd this essential TH440-T4\/4T60E rebuild part to your cart today and enjoy crisp, reliable shifts!\u003c\/p\u003e","brand":"Trans Parts Direct","offers":[{"title":"Default Title","offer_id":52425246245045,"sku":"84880 P","price":41.01,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1006\/3872\/0181\/files\/84880-P-scaled.jpg?v=1786619168","url":"https:\/\/transpartsdirect.com\/products\/stellar-automotive-group-th440-t4-4t60e-1-2-amp-3-4-accum-piston-fits-gm-83-up","provider":"Trans Parts Direct","version":"1.0","type":"link"}